کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1661766 | 1008430 | 2008 | 8 صفحه PDF | دانلود رایگان |
Ni coating was deposited on carbon steel by a mechanical attrition enhanced electroplating (MAEE) process. The electroplating was conducted in a traditional Watts' solution and the mechanical attrition action was applied by impact of glass balls on the sample surface with a special vibrating frequency. It is shown that the attrition has significant effects on the microstructure and the characteristics of electroplated Ni coating. When the current density is below a limited current density (iL), the growth of grains is hindered under the mechanical attrition action and the nucleation of Ni grains processes at a high rate. Thus the Ni coating deposited has smooth surface morphology, refined grain size, pore-free, and with increased microhardness and excellent corrosion resistance. When the current density is above iL, Ni dendrites formed by conventional electroplating can be cold-welded together by the moving glass balls, resulting in a compact Ni coating. Therefore, high-dense Ni coatings can be plated at a high current density and deposition rate.
Journal: Surface and Coatings Technology - Volume 202, Issue 10, 15 February 2008, Pages 2139–2146